package com.sky.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.google.gson.JsonObject;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;

import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.result.PageResult;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * 分类业务层
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {

        String code = userLoginDTO.getCode();
        String openid = getOpenid(code);

        if (openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        User user = userMapper.getByOpenid(openid);
        if (user==null){
            user = new User();
            user.setOpenid(openid);
            user.setCreateTime(LocalDateTime.now());

            userMapper.insert(user);
        }

        return user;
    }

    private String getOpenid(String code) {

        Map map = new HashMap();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;

    }
}
